Added back changelog file

jkasten2 · jkasten2 · commit d4fadbd20d42 · 2019-07-22T20:21:39.000-07:00
* Change log file to link to the github release notes
* This file must be present to prevent points from being removed on pub.dev.
diff --git a/CHANGELOG.md b/CHANGELOG.md
@@ -0,0 +1,2 @@
+Please see the release notes page for the full change log
+https://github.com/OneSignal/OneSignal-Flutter-SDK/releases

Original file line number	Diff line number	Diff line change
`@@ -0,0 +1,2 @@`
	`1`	`+Please see the release notes page for the full change log`
	`2`	`+https://github.com/OneSignal/OneSignal-Flutter-SDK/releases`